Sand-cutting machine



H. L. WADSWORTH. SAND CUTTING MACHINE. FILED NOV-12,1919.

Jan. 30, 1923.

- v a g u Y 0/0 mm f N W b a m% fl fi Z :5 5 3 Patented den. 32, 1923.

warren stares titans rarsnr cre HOWARD L. WADSWORTH, OECLEVELAND, OHIO.

SAND-CUTTING MACHINE.

Application filed November 12, 19 19. $eria1 No..337,e78.

T 0 all whom it may concern. f

7 Be it known that I, Howama ii. Wans- WORTH, acitizen ofthe UnitedStates, and a' more particularly directed to an improved machine forcutting, and at the same time screening sand from sand heaps into which.the used moldingsand is piled in foundries.

In this art it has .been customary either to have the used sand shoveledover and over by laborers, or, in the larger foundries, to employ a sandcutting machine, usually consisting of a large horizontally disposedcylinder with spiral blades for lifting and throwing the sand from sideto side, in thi way cutting and blending it.

The disadvantage of both of the above methods is that while they serveto cut the sand and disintegrate it they do not screen it, and thereforesmall metal articles are left in the sand with disastrous results whenthe sand is again used. To avoid this in most ii'oundries the sand isscreened at least once a week, but thi is done by hand and entails aconsiderable expense. j The present machine is designed to both out andscreen the sand at the same time, and the machine as constructed isextremely simple and relatively inexpensive. To the accomplishment ofthe foregoing and related ends, said invention, then, consists of themeans hereinafter fully described and particularly pointed out in theclaims.

The annexed drawing and the following description set forth in detailcertain mechanism embodying the invention, such disclosed meansconstituting, however, but one of variou mechanical forms in which theprinciple of the invention may be used.

In said annexed drawing Fig. 1 is a side elevation of my machine; andFig. 2 is a plan View of the same.

The machine consists of a rectangular framework 1 mounted upon drivingtraction wheels 2 and undriven wheels 3. Mounted in an inclined positionbetween the side rails of the frame 1 i a screen 4, which is proterialas rubber.

vided atitslower end with a steel scoop or lifting platen, leading fromabout the level of thepfloor'to the beginningof the scree; surface.Mounted above, and parallel with the screen 1, is a conveying mechanismcon sisting of drums 6 and 7, over which passes an endless chain 8,which also extends across the entire width of the frame of the machineand across the surface of the machine. This endlessbelt 8 is providedwith a series of rectangularly shaped and spaced projecting blades 9of;steei or of similar hard material, which are .arranged to passparallel to the surface of the screen upon the operation of theconveyor, but to be spaced therefrom by a distance of about an mch,which is suffi- 'cientto allow. for the ordinary metal articles whichare found in the sand to prevent injur to the screen, which would be theresult if the steel blades were closely adjacent to thev screen. urface.Attached-to the faces of the .blades9 are flexible blades or brushes 10,which may be of either stiff or yie-lda-ble wire, or of some such ma-These blades 10 are arranged to contact the surface of the screen andwork. the sand through the meshesthereof so that all of the sand isworked through the screen before-reaching flexible bladesand are thendischargedinto thechamber 12. The action ofthe conveyor will be readilyunderstood from the .foregoing description and from the drawing, as theblades 9 and 10 cut into a pile of sand and deliver successive slices orportions of the sand on to the screen surface. The machine is drivenfrom a motor 13 mounted upon the rear end of the frame and connected bya chain 14 and sprockets 15 and 16 to the shaft of the driving wheel 2.The conveying mechanism is driven from a second motor 17 connectedthrough sprockets-18 and 19 and a chain 20 to the shaft 21 of theconveyor drum 7.

Side plates 22,22, are secured to and depend from the side orlongitudinal members of the frame 1 and extend nearly to the floor uponwhich the machine operates, and serve to maintain the screened sand in apile besimilarly.

o cu; :gllCC '1 J: l U 4. V e sum and oi-cc die same tniocgh said hineol the character deseribed .ie conjibination of a frame mow able overthe ground against a pile of sand to be work d. an inclined screenmounted in said irame and having its lower end adjacent the forward endof said frame. and

' blades adapted to a series of sandcnttmo' successiiely cut slices i omsuch pile of sand ongh such screen.

and force the same th;

In a machine of the character described, the combination of a frame moable over the ground against a pile of sand to be Worked, an inclinedscreen mounted in said frame and having its lower end adj acent heforward end of said frame, a series oil nnd cutting elements adapted tosuccescnt slices from such pile of sand, and

se of relatively flexible elements to brush cut slices of sand over theof said screen.

l. in a machine of the character described the combination of: a framemoi= able orer the ground against a pile of sand to be worked. aninclined screen mounted in laving its lower end ad end oi said lrame andianisii arranged to more 7. said screen, said mechanism inseries ofoutwardly extending rsely elongated sand cutting blades, d blades beingarranged to move closely on to the surface of said screen.

nachine of the character described, nation of :1 frame movable over asagainst pile of sand to he n inclined screen mounted in said d h in itslower end adjacent the f v frame and an endless eying; mechanismdisposed parallel i said screen, said mechanism projecting 7 above theforward lower end of (Eng transversely elongated blades d to outsuccessive slices from such pile oi sand and move the same onto saidscreen.

in machine of the character dethe combination of a frame movo over toeground against a pile of sand. L0- be zroz'lre clined screen mounted insaid frame .1 1 ring its lower end adjacent the forward end of saidframe, and an endless belt conveying mechanism disposei'l parallel withsaid screen, said mecl1a nism projecting forwardly above the ion lowerend of said screen and having a of onto ardly extending blades adapted tsuccessive slices from such pile 01 nd move the ie onto said screen,said oelt haiinp: also a series of relati el flexible blades locatedadjacent to said first named blades and adapted to brush the sand out bysaid first named blades over the sin'iace of said screen.

Signed by me this th day of 191 HOW ARD L. lVADSlVORTH.

